JPS5616388A - Generating circuit of time-division multifrequency signal - Google Patents

Generating circuit of time-division multifrequency signal

Info

Publication number
JPS5616388A
JPS5616388A JP9238179A JP9238179A JPS5616388A JP S5616388 A JPS5616388 A JP S5616388A JP 9238179 A JP9238179 A JP 9238179A JP 9238179 A JP9238179 A JP 9238179A JP S5616388 A JPS5616388 A JP S5616388A
Authority
JP
Japan
Prior art keywords
address
output
rom1
time
division
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9238179A
Other languages
Japanese (ja)
Inventor
Kunio Imoto
Seiichiro Shigaki
Tomoji Inoue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP9238179A priority Critical patent/JPS5616388A/en
Publication of JPS5616388A publication Critical patent/JPS5616388A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To realize a time-division multifrequency signal generating circuit having a small number of using component parts and a high frequency accuracy along with a simple adjustment, by giving the time-division multiplication to an optional number of sine waves having an optional frequency. CONSTITUTION:Reading address 4-1 of ROM1 which is decided by output 3-1 of 1/N divider 3 is delivered from address memory device 4. This output is applied to lower-rank address input terminal ARA of ROM1, and as a result output data 1-1 and 1-2 of ROM1 are decided. If output 1-2 of ROM1 is 0, the signal of terminal SI1 is delivered. In this case, the output of selecting circuit 6 is applied to data input terminal DIA of memory device 4, and 1 is added to the contents of the present address. On the other hand, the signal of terminal SI2 is selected when output 1-2 of ROM1 is 1 to be used for the input of device 4. The address advances by one by the next clock to be read, and at the same time 1 is added to the contents of the address. This action is repeated until divider 3 reaches N, and thus the digital quantity of N units of sine waves emerges.
JP9238179A 1979-07-19 1979-07-19 Generating circuit of time-division multifrequency signal Pending JPS5616388A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9238179A JPS5616388A (en) 1979-07-19 1979-07-19 Generating circuit of time-division multifrequency signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9238179A JPS5616388A (en) 1979-07-19 1979-07-19 Generating circuit of time-division multifrequency signal

Publications (1)

Publication Number Publication Date
JPS5616388A true JPS5616388A (en) 1981-02-17

Family

ID=14052836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9238179A Pending JPS5616388A (en) 1979-07-19 1979-07-19 Generating circuit of time-division multifrequency signal

Country Status (1)

Country Link
JP (1) JPS5616388A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022861A (en) * 1983-01-18 1985-02-05 ジーイーシー　プレッシー　テレコミュニケーションズ　リミテッド Signal voice generator
JPS61149877A (en) * 1984-12-25 1986-07-08 Tokyo Keiki Co Ltd Device for indicating real motion of ppi radar

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022861A (en) * 1983-01-18 1985-02-05 ジーイーシー　プレッシー　テレコミュニケーションズ　リミテッド Signal voice generator
JPS61149877A (en) * 1984-12-25 1986-07-08 Tokyo Keiki Co Ltd Device for indicating real motion of ppi radar

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